Structural Dynamics

Lecturer(s): Sebastien BESSET
Course ⋅ 4 hTC ⋅ 4 hPW ⋅ 4 hStudy ⋅ 8 h


The aim of this course is to deepen the techniques of modal synthesis: truncation effects, structural modifications, and to extend the dynamic models to the situations of structures subjected to large displacements and / or combined loads, to anticipate and control the associated phenomena during the design process: risks of instability and floating. The pedagogical content is based on additional training in the form of courses and TD, a practical session on the effect of a static pre-load on the dynamic behavior of a structure and a project which will serve as a support example.

Palabras clave

Component mode synthesis, large displacements, prestress loading


  • Modal synthesis: description of the dynamic behavior of a structure based on the eigenmodes. Definition of the number of modes taken into account depending on the domain Frequency of excitation, effects of modal truncation. Prediction of the effect of a localized structural change.
  • Large displacements, static pre-stresses: equations on simple cases, qualitative prediction of the expected phenomena, implementation of simulations.
  • TP: modifications of the eigenmodes of a structure subjected to a static loading increasing. Buckling phenomenon.
  • BE: project to design a structure or to simulate the behavior of a structure.

Learning Outcomes

  • To be able to propose a model of predictive simulation of dynamic behavior of a structure.
  • To be able to gather the necessary information and estimate their degree of importance and reliability.
  • To know how to evaluate the validity limits of a model.
  • To understand the concepts necessary for the use of a dynamic computation code


Final mark = 67% Knowledge + 33% Know-how Knowledge N1 = 100% continuous assessment Know-how N2 = 100% continuous assessment